Bracket system for mounting electrical boxes

ABSTRACT

A bracket system for mounting an electrical box and other components to a ceiling structure can include a support bar and a mounting bracket. The mounting bracket can be configured to receive an end of the support bar and selectively secure the support bar at any of a plurality of positions relative to the mounting bracket.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to U.S. Provisional Patent Application No. 62/902,238, filed on Sep. 18, 2019 and titled Bracket System for Mounting Electrical Boxes, the entirety of which is incorporated herein by reference.

BACKGROUND

In many applications, it may be useful to support electrical boxes and other components. For example, some applications may require electrical boxes to be supported at particular heights within ceiling structures.

SUMMARY

Some embodiments of the invention provide a bracket system for securing an electrical box to a ceiling structure, the ceiling structure including a ceiling member. The bracket system can include a support bar that includes a support section configured to support the electrical box, and an attachment arm that includes a plurality of slots. The bracket system can further include a mounting bracket having a bracket body, a channel structure integrally formed on the bracket body and configured to slidably receive the attachment arm, and a locking arm extending integrally from the bracket body. The locking arm can be movable relative to the bracket body and include a locking tab that is in alignment with the channel structure. Further, the locking tab can be configured to engage any one of the slots of the attachment arm, depending on the extent to which the attachment arm is received within the channel structure, to selectively secure the support bar at any of a plurality of heights relative to the mounting bracket.

Some embodiments of the invention provide a mounting bracket for use with a bracket system for securing an electrical device to a building structure via a support body, the building structure including a building member, and the support bar including an attachment arm. The mounting bracket can include a bracket body, a channel structure on the bracket body, configured to slidably receive the attachment arm, and a locking arm extending from the bracket body. The locking arm can include a locking tab that is in alignment with the channel structure. Further, the locking arm can be movable relative to the bracket body to move the locking tab relative to the channel structure between an engaged position and a disengaged position, so that the locking arm is configured to selectively secure the support body to the mounting bracket at any of a plurality of insertion distances relative to the channel structure.

Some embodiments of the invention provide an integrally formed mounting bracket for use with a bracket system for securing an electrical device to a ceiling structure, the ceiling structure including a ceiling member, and the bracket system including a support body that includes a support section to support the electrical device and an attachment arm. The mounting bracket can include a bracket body and a guide tab extending from the bracket body and bending so that a portion of the guide tab extends laterally across the bracket body. The guide tab can be integrally formed with the bracket body and can at least partly define a channel profile that defines an insertion axis and is sized to receive the attachment arm along the insertion axis. The mounting bracket can further include a support arm extending away from the bracket body, the support arm defining a clip sized to engage the ceiling member, and a locking arm extending integrally from the bracket body, the locking arm including a locking tab. Further, the locking arm can be movable relative to the bracket body to move the locking tab relative to the guiding tab between an engaged position, in which the locking tab is in a first alignment with the channel profile along the insertion axis to engage the attachment arm, and a disengaged position, in which the locking tab is in a second alignment with the channel profile along the insertion axis to release the attachment arm.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of embodiments of the invention:

FIG. 1 is a top isometric view of a ceiling structure and a bracket system according to an embodiment of the invention, in an example installation, the bracket system including a mounting bracket and a support bar, and the ceiling structure including a ceiling member;

FIG. 2 is an exploded top isometric view of the bracket system and the ceiling structure of FIG. 1;

FIG. 3 is a top isometric partial view of the ceiling member of FIG. 1;

FIG. 4 is a top isometric view of the support bar of FIG. 1;

FIG. 5 is a rear isometric partial view of the support bar of FIG. 1;

FIG. 6 is a front isometric partial view of the support bar of FIG. 1;

FIG. 7 is a rear isometric view of the mounting bracket of FIG. 1;

FIG. 8 is a front isometric view of the mounting bracket of FIG. 1;

FIG. 9 is a rear side elevational view of the mounting bracket of FIG. 1;

FIG. 10 is a left side elevational view of the mounting bracket of FIG. 1;

FIG. 11 is a front isometric partial view of the mounting bracket of FIG. 7 mounted to the ceiling member of FIG. 3;

FIG. 12 is a rear isometric partial view of the mounting bracket of FIG. 7 mounted to the ceiling member of FIG. 3;

FIG. 13 is a front isometric partial view of the bracket system and the ceiling structure of FIG. 1;

FIG. 14 is a left side elevational view of the bracket system and the ceiling structure of FIG. 1;

FIG. 15 is a rear isometric partial view of the bracket system and the ceiling structure of FIG. 1; and

FIG. 16 is a front isometric partial view of the bracket system and the ceiling structure of FIG. 1.

DETAILED DESCRIPTION

Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings.

Also as used herein, unless otherwise specified or limited, directional terms are presented only with regard to the particular embodiment and perspective described. For example, reference to features or directions as “horizontal,” “vertical,” “front,” “rear,” “left,” “right,” and so on are generally made with reference to a particular figure or example and are not necessarily indicative of an absolute orientation or direction. However, relative directional terms for a particular embodiment may generally apply to alternative orientations of that embodiment. For example, “front” and “rear” directions or features (or “right” and “left” directions or features, and so on) may be generally understood to indicate relatively opposite directions or features.

Also as used herein, unless otherwise specified or limited, “lateral” indicates a direction that is transverse to a reference direction. Correspondingly, as used herein relative to adjustable brackets, a “lateral” direction generally refers to a direction that is transverse to the direction of adjustment. In this regard, for example, for bracket systems that provide for vertical adjustment of support bars or other structures, a “lateral” direction is a direction that is transverse to the vertical direction (e.g., the horizontal direction).

The following discussion is presented to enable a person skilled in the art to make and use embodiments of the invention. Various modifications to the illustrated embodiments will be readily apparent to those skilled in the art, and the generic principles herein can be applied to other embodiments and applications without departing from embodiments of the invention. Thus, embodiments of the invention are not intended to be limited to embodiments shown, but are to be accorded the widest scope consistent with the principles and features disclosed herein. The following detailed description is to be read with reference to the figures, in which like elements in different figures have like reference numerals. The figures, which are not necessarily to scale, depict selected embodiments and are not intended to limit the scope of embodiments of the invention. Skilled artisans will recognize the examples provided herein have many useful alternatives and fall within the scope of embodiments of the invention.

As noted above, in some contexts, it may be useful to secure or support components relative to certain structures. For example, electrical components, such as electrical boxes, may need to be mounted in a ceiling structure. Conventional mounting assemblies commonly use fasteners to secure a support bar to areas of a ceiling structure, and, thus, the support bars of conventional mounting assemblies are often configured only to be installed at a fixed height. Accordingly, any components secured to that support bar may be limited to a predetermined height, such as may be required to ensure alignment with other ceiling structures (e.g., ceiling tiles) which may limit component compatibility. Embodiments of the invention can help alleviate this issue, and others. For example, embodiments of the invention may provide a mounting bracket that can be used to selectively secure a support bar or other support body at any of a plurality of heights relative to a ceiling structure. Embodiments of the invention may also provide a mounting bracket and a support body that can be secured to a ceiling structure without additional hardware, such as fasteners.

In some embodiments, the present invention may provide a mounting bracket for adjustably securing an electrical device or other object to a ceiling structure. The mounting bracket may include a bracket body that is configured to receive portions of the ceiling structure. For example, the mounting bracket may include channels that, together with the bracket body, are configured for removably and adjustably receiving and securing an attachment arm of a support body (e.g., a support bar that extends across the ceiling structure).

Generally, as referred to herein, a channel can be a geometric aspect of a component that bounds a region on at least three sides along an extended axial distance, as defined by a channel structure (e.g., above, below, and to either side of the region from a perspective along the axial direction). Correspondingly, a channel profile refers to the particular geometric profile of part or all of a particular channel. In some cases, a channel may include a closed channel profile, with channel structures that extend continuously along at all sides of the channel over an overlapping axial distance to fully enclose the channel over the overlapping axial distance. In some cases, a channel may include an open channel profile, with channel structures that do not fully enclose the channel over a particular axial distance (e.g., the entire channel). In some cases, an open channel profile may be defined by channel structures that extend along only two or only three sides of the channel over an overlapping axial distance. Relatedly, some channel profiles may be continuous, with channel structures extending continuously over an entire axial length of a channel, whereas other channel profiles may be discontinuous, with channel structures not extending continuously over an entire axial length of a channel.

Some embodiments of the invention may provide a mounting bracket that defines an open channel profile. Some embodiments may have a discontinuous channel profile. In some cases, a combination of these aspects may be possible—i.e., an open, discontinuous channel profile—such as, for example, a channel profile that is not fully enclosed over its entire axial length and does not bound a region on at least three sides along the axial length. This may allow for relatively efficient manufacturing, as well as relatively easy adjustment of an associated support bar or other body. In some embodiments, channels or channel profiles of mounting brackets may be defined by integrally formed features of a bracket body, including stamped tabs with free ends, or the like, alone or in combination with one or more main portions of the bracket body.

Generally, a channel on a mounting bracket according to embodiments of the invention may be configured to receive and secure an attachment arm of a ceiling structure at a plurality of orientations along the channel. Correspondingly, a channel may generally define an insertion axis, which may be a central axis extending in an axial direction defined by the channel, and an attachment arm of a ceiling structure may be configured for insertion and adjustment along the insertion axis. In some embodiments, one or more resilient arms that are biased for securing the attachment arm may be used. For example, a resilient locking arm may be biased toward engagement with an attachment arm that is disposed within a channel of a mounting bracket, so that the locking arm tends to secure the attachment arm at a particular location along the channel unless actively engaged to release the attachment arm. In some embodiments, at least a portion of a locking arm may extend to be aligned with a channel of a mounting bracket such that the locking arm may engage the attachment arm within a channel profile of the channel, or at a location spaced apart from the channel profile in the axial direction, as described in greater detail below.

Embodiments of the invention are presented below in the context of support bars intended to secure electrical boxes to ceiling structures, including T-grid ceiling structures. Correspondingly, some embodiments provide for vertical adjustment of a support bar relative to a mounting bracket and thereby for vertical adjustment of a support bar and an electrical box relative to a ceiling structure. Although these configurations can be particularly useful in some contexts, including due to the particular requirements for mounting electrical boxes to ceiling structures, other configurations are possible. For example, the principles disclosed herein can be used with support bars intended to secure any variety of mountable components, including light fixtures, vents, audio devices, and so on. Further, some embodiments may be configured for adjustment in non-vertical directions, including with a bracket body that is configured to receive and secure one or more arms of a support body at any of a plurality of insertion distances relative to a channel of the bracket body.

Referring to FIGS. 1 and 2, embodiments of the present invention generally provide a bracket system for mounting and adjustably securing an electrical box or other object to a ceiling structure (or other building structures) without a need for fasteners, or other added components. For example, in the embodiment illustrated, a bracket system 100 for securing an electrical box 102 includes a support bar 104 and a set of two mounting brackets 106.

In the embodiment illustrated, the mounting bracket 106 is configured such that it may secure the support bar 104 to a ceiling structure, which includes two ceiling members 108 in the embodiment illustrated. Although the bracket system 100 according to the present embodiment is illustrated with two mounting brackets 106, one of ordinary skill in the art would understand that any number of mounting brackets 106 may be used. For example, in some instances, the bracket system may include one, three, or four mounting brackets. Further, in some embodiments, sets of substantially identical mounting brackets can be used to simplify installation procedures and reduce complications for inventory management. In this regard, for example, only one of the mounting brackets 106 will be described in detail below, although some configurations may include multiple types of mounting brackets.

As will be described in greater detail herein, each of the support bar 104, the mounting brackets 106, and the ceiling members 108 are configured so that they may be assembled without additional hardware, such as separate fasteners. Generally, the mounting brackets 106 are configured to be removably secured to the ceiling members 108, and the support bar 104 is configured to be removably and adjustably secured to the mounting brackets 106 in order to support an object (e.g., the electrical box 102) at any of a plurality of heights relative to the ceiling members 108.

In different installations, mounting brackets according to embodiments of the invention can be readily secured to a variety of building (e.g., ceiling) structures. For example, FIG. 3 illustrates aspects of a particular configuration of the ceiling member 108 that may be used with the bracket system 100 of FIGS. 1 and 2. The illustrated ceiling member 108 is provided for example purposes only, and other configurations are possible. In the embodiment illustrated, the ceiling member 108 is a T-grid bar that includes a first side 110, a second side 112, a flat base 114, and a vertical stem 116 extending substantially perpendicularly from the flat base 114 to a widened top 118. However, a variety of other configurations are possible. For example, the bracket system 100 according to the present invention may be configured to mount to any variety of a ceiling member or non-ceiling members.

Referring to FIGS. 4-6, the support bar 104 according to the present embodiment includes two ends 120 and a support section 122 that is provided to support components, such as an electrical box. The two ends 120 are symmetrical about the support section 122, and, accordingly, the two ends 120 share substantially identical aspects. As best shown in FIG. 5, each end 120 includes two substantially identical attachment arms 124. Although each end 120 of the support bar 104 according to the present embodiment includes two attachment arms 124, alternative configurations are possible. For example, in some embodiments, each end of a support bar may include at least one attachment arm. However, in some embodiments, use of two or more attachment arms may provide increased stability against rocking or other unintended displacement. Further, in some embodiments, a support body that is not configured as a support bar may also generally be used, according to the principles of adjustment and attachment disclosed herein.

Generally, support bodies according to the invention can include one or more attachment arms with mounting features that allow adjustable attachment to a mounting bracket. Still referring to FIG. 5, for example, each attachment arm 124 individually extends from the support section 122, thereby defining a central channel 126 therebetween. Each attachment arm 124 includes a first section 128 that is a parallel (e.g., coplanar) extension of the support section 122 and a second section 130 that extends substantially perpendicularly from the first section 128. Turning to FIG. 6, a plurality of slots 134 are disposed along lengths of each the attachment arms 124, on a central wall of a channel bounded by opposing lips 132. Although the plurality of slots 134 are equidistantly spaced along the lengths of the attachment arms 124 in the embodiment illustrated, alternative configurations are possible. For example, in some instances, the slots 134 may be randomly or otherwise non-uniformly spaced along the lengths of the attachment arms 124. In some embodiments, only one of a plurality of attachment arms may include slots. In some embodiments, other mounting features for adjustable attachments can be provided, such as an array of openings other than slots, an array of protrusions, recesses, and/or notches, and so on. Further, some embodiments may include slots or other features but may include only a single lip (e.g., similar to the lips 132) or no lip at all.

In some embodiments, as also noted above, mounting brackets can be configured to adjustably engage and secure support bars (e.g., the support bar 104) at any number of heights relative to a reference direction (e.g., vertically). For example, FIGS. 7-10 illustrate an example configuration of the mounting bracket 106 for use in the bracket system 100 of FIGS. 1 and 2 according to an embodiment of the invention. As further discussed below, the mounting bracket 106 can be used to selectively secure the arms 124 at any of a plurality of insertion distances relative to channels defined by the mounting bracket 106, which may correspond to any of a plurality of heights for the support bar 104 when the mounting bracket 106 is secured to a ceiling member.

As illustrated, the mounting bracket 106 is formed as a stamping from a single blank of material, although a variety of other approaches are possible. With reference to FIG. 7 in particular, the mounting bracket 106 has a bracket body 136 that includes a support edge 138 and is configured to securely engage the ceiling member 108. Further, the bracket body 136 supports two channels defined by channel structures 140 and a locking arm 142 that are collectively sized and oriented to slidingly receive and selectively secure the support bar 104 (see FIG. 1). However, other configurations are possible, including configurations with only one channel or with one or more channels that are defined by different structures than the channel structures 140.

Referring also to FIG. 8, the bracket body 136 is an integrally formed, planar piece with a first side 144 and an opposing second side 146 (see FIG. 7). Further, the channel structures 140 are integrally formed with the bracket body 136 to extend on (and away from) the first side 144 thereof. The channel structures 140 are symmetrical about a center axis A (see FIG. 9) and each include a plurality of tabs 148, also referred to herein as guide tabs, that extend from the bracket body 136 to define a partly open channel profile 150. In particular, the tabs 148 on opposing lateral sides of the bracket body 136 bend to extend laterally toward each other and, accordingly, the partly open channel profiles 150 open toward each other.

Further, in the illustrated embodiment, the tabs 148 define spaced apart channel sections along an insertion axis 151, corresponding to an open, discontinuous channel profile for each of the two channels defined by the channel structures 140. The tabs 148 are also formed to extend over only two sides of a structure that is inserted through the relevant channel along the insertion axis 151.

Thus, for example, the tabs 148, in combination with the bracket body 136 and the locking arm 142 (as further discussed below) can provide an appropriately bounded channel for the attachment arms 124, while allowing for relatively efficient manufacturing and avoiding the potential over-constraint of a more extensively enclosed channel profile. In other embodiments, however, other configurations are possible. For example, in some embodiments, fully enclosed (e.g., pocket) channel structures can be formed, channel structures can be formed without spaced apart channel sections (e.g., to define continuous channels), or tabs that form part of a channel section can extend over more or fewer than two sides of an inserted structure.

Generally, mounting brackets according to embodiments of the invention can include a movable locking arm that can selectively secure (and release) an associated support bar against (and for) slidable adjustment relative to the mounting brackets. For example, in the illustrated embodiment of the mounting bracket 106, the locking arm 142 is a cantilevered spring arm that is attached to and extends from the bracket body 136 at a first end 152. From the first end 152, the locking arm 142 extends to a free end 160 that is configured as a manually engageable release tab 162 that extends at least partly to the second side 146 of the bracket body 136 (e.g., opposite the channel structures 140). The locking arm 142 also extends between the channel structures 140 to define further the partly open channel profiles 150, as may further increase efficiency in manufacturing and ease of operation.

In different embodiments, different locking features can be provided on a locking arm in order to selectively engage corresponding mounting features on a support bar (e.g., the slots 134 or other similar openings). For example, the locking arm 142 includes two locking tabs 154 that are supported on lateral extensions 156 of the locking arm 142 that extend from opposing sides thereof. Each of the lateral extensions 156 of the locking arms 142 is in alignment with a respective one of the channel structures 140 to further define the respective partly open channel profiles 150. More specifically, each of the lateral extensions 156 of the locking arms 142 extends transverse to and intersects the channel profiles 150, extending within and beyond the channel structures 140. As best seen in FIG. 7, each lateral extension 156 also defines a receiving channel 158 that opens to the second side 146 of the mounting bracket 106.

Through appropriate placement on the lateral extensions 156, each of the locking tabs 154 is also supported in alignment with a respective one of the channel structures 140, to be positioned to engage a corresponding mounting feature on an attachment arm of a support bar that has been inserted into the channel structure 140. In particular, the locking tabs 154 are configured to be positioned in axial alignment with the channel profiles 150 such that the locking tabs 154 may extend across the channel profile 150 or a projection of the channel profile 150 along the insertion axis 151. Engagement and movement of the locking arm 142 thus may bring the locking tabs 154 into and out of alignment with the channel profiles 150 to engage or release the attachment arms 124, as further described below.

In different embodiments, different structures can be provided to secure a mounting bracket to a ceiling member or other building structure. For example, still referring to FIG. 7, the mounting bracket 106 further includes two support arms 164 that are cantilevered spring arms integrally formed with the bracket body 136. Although the mounting bracket 106 according to the present embodiment includes two support arms 164, alternative configurations may provide a mounting bracket with at least one support arm. The support arms 164 each include a first portion 166 that extends to the second side 146 of the bracket body 136 substantially perpendicularly with the bracket body 136 and a second portion 168 that extends from the first portion 166 at a rest angle α (see FIG. 10). In the embodiment illustrated, the angle α is less than 90°. Each of the support arms 164 further include a release tab 170 that extends from the second portion 168 at a rest angle β that is greater than the angle α (see FIG. 10). In the illustrated embodiment, each of the support arms 164 includes an engagement tab 172, formed as a coplanar extension opposite the release tab 170 that extends toward the first side 144 of the mounting bracket 106.

Referring to FIGS. 11 and 12, the mounting bracket 106 is configured to be slid (e.g., snapped) onto the ceiling member 108. In the embodiment illustrated, the bracket body 136 is configured to be disposed on the second side 112 of the ceiling member 108, opposite the support arms 164. Further, due to the height of the vertical stem 116, the support edge 138 contacts and is supported by the flat base 114 of the ceiling member 108 while the bracket body 136 contacts and is support by the widened top 118. In other installations, however, other sizes of ceiling members can be used, and the support edge 138 may not always contact a base of a ceiling member. Referring to FIG. 12 in particular, the support arms 164 of the mounting bracket 106 are configured to contact the widened top 118 on the first side 110 of the ceiling member 108. Accordingly, the engagement tabs 172 engage the widened top 118, thereby securing the mounting bracket 106 against removal from the ceiling member 108.

As the mounting bracket 106 is slid onto the ceiling member 108, the support arms 164 are configured to flex and pass over the widened top 118, and unflex to urge the engagement tabs 172 into engagement with the first side 110 of the ceiling member 108. To remove the mounting bracket 106 from the ceiling member 108, the release tabs 170 are configured to be manually engaged to flex the support arms 164 away from the first side 110 of the ceiling member 108 and thereby release the engagement tab 172 of the respective support arm 164 from engagement with the widened top 118.

Referring to FIG. 13, the mounting bracket 106 is configured to slidably receive and removably (and adjustably) secure one of the ends 120 of the support bar 104 without additional hardware, such as fasteners, on the first side 144 of the bracket body 136. Each of the partly open channel profiles 150 defined by the channel structures 140 is configured to receive and retain one of the attachment arms 124. Therefore, when assembled, each attachment arm 124 is removably secured in the partly open channel profile 150 defined by the respective channel structure 140.

More specifically, in the embodiment illustrated, the plurality of tabs 148 of each channel structure 140 partially wrap around the respective attachment arm 124, and the receiving channel 158 defined by each lateral extension 156 receives one of the lips 132 of the respective attachment arm 124 on an opposite side of the attachment arm 124 from the corresponding tabs 148. Further, due to the biased configuration of the locking arm 142, the locking tabs 154 extend into and engage an aligned respective one of the slots 134, when not actively held away from the attachment arms 124, to secure the corresponding attachment arm 124 against sliding movement within the corresponding channel. As appropriate, the locking tab 154 can also be selectively released and then reengaged with any one of the plurality of slots 134 disposed on the attachment arm 124, to selectively secure the locking arms 142 at a different predetermined insertion distance along the channel structures 150 (i.e., as shown, to secure the support bar 104 at a particular height). Accordingly, depending on the extent to which the attachment arm 124 is received within the channel structure 140, the mounting bracket 106 can selectively secure the support bar 104 at any of a plurality of heights relative to the mounting bracket 106 and the ceiling member 108.

In the illustrated embodiment, the locking arm 142 is moveable relative to the bracket body 136 to simultaneously move the locking tabs 154 into or out of engagement with any one of a set of the slots 134 of the attachment arms 124, i.e., between an engaged position and a disengaged position. In the engaged position, the locking tabs 154 may be in a first alignment relative to the channel profiles 150, and, in the disengaged position (as shown in dash-dot-dash lines in FIG. 14), the locking tabs 154 may be in a second alignment relative to the channel profiles 150. In particular, in the illustrated embodiment, to allow the attachment arms 124 to be slidably inserted into the partly open channel profiles 150, the locking arm 142 is configured to be manually moved relative to the bracket body 136 from a rest configuration (see FIG. 10), to be at least partly clear of the partly open channel profiles 150. so that the attachment arms 124 can slide therein along the insertion axis 151. More specifically, the release tab 162 on the locking arm 142 is configured to be manually engaged from the second side 146 (see FIG. 15) of the bracket body 136 so that the locking arm 142 can flex on and away from the first side 144 toward a flexed configuration, and thereby displace the locking tabs 154 from the engaged position and the corresponding alignment with the channel structures 140 and the insertion axis 151. With the locking tabs 154 thus displaced, the attachment arms 124 can be inserted into the partly open channel profiles 150. The release tab 162 can then be released, so that the locking arm 142 springs resiliently back towards its rest configuration, to a locking configuration, and thereby biases the locking tabs 154 into a selected set of the slots 134 to secure the support bar 104 at a desired height relative to the mounting bracket 106, as illustrated by FIG. 14.

In some embodiments, a support bar can be initially secured at a particular height (e.g., for transport) and then can be adjusted along an insertion axis to a different height for final installation. For example, still referring to FIG. 14, when each locking tab 154 is disposed in any one of the plurality of slots 134, the release tab 162 still extends to the second side 146 of the bracket body 136. Therefore, to disengage the locking tabs 154 from the slots 134 of the attachment arms 124, the release tab 162 can be manually engaged from the second side 146 of the bracket body 136, thereby flexing the locking arm 142 away from the attachment arms 124 and moving the locking tabs 154 out of engagement with the slots 134 of the attachment arms 124. Disengagement of the locking tabs 154 allows the support bar 104 to be repositioned to any of a plurality of alternate heights relative to the mounting bracket 106, an example of which is shown in FIG. 16. As similarly noted above, the release tab 162 can then be released so that the locking tabs 154 can secure the support bar 104 at the repositioned height.

Thus, embodiments of the invention can provide improved mounting devices for electrical boxes or other components. In some embodiments, for example, an improved mounting system according to the invention may not need fasteners or added hardware and may provide height adjustment capabilities. Thus, for example, it may be relatively easy to use a single mounting system to mount electrical boxes (or other objects) that have a wide range of depths.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. 

What is claimed is:
 1. A bracket system for securing an electrical box to a ceiling structure, the ceiling structure including a ceiling member, the bracket system comprising: a support bar that includes a support section configured to support the electrical box, and an attachment arm that includes a plurality of slots; and a mounting bracket that includes: a bracket body; a channel structure integrally formed on the bracket body and configured to slidably receive the attachment arm; and a locking arm extending integrally from the bracket body, the locking arm being movable relative to the bracket body and including a locking tab that is in alignment with the channel structure; the locking tab being configured to engage any one of the slots of the attachment arm, depending on the extent to which the attachment arm is received within the channel structure, to selectively secure the support bar at any of a plurality of heights relative to the mounting bracket.
 2. The bracket system of claim 1, wherein the locking arm is a spring arm that is resiliently biased toward engagement with the support bar and is configured to be manually moved relative to the bracket body to disengage the locking tab from the slots of the attachment arm so that the attachment arm can be slid within the channel structure.
 3. The bracket system of claim 2, wherein the attachment arm includes a lip; wherein the locking tab is supported on a lateral extension of the spring arm; and wherein the lateral extension forms a channel that receives the lip of the support bar when the locking tab is engaged with the slots of the attachment arm.
 4. The bracket system of claim 1, wherein the channel structure is formed on a first side of the bracket body; wherein the locking tab is configured to engage the slots of the attachment arm from the first side of the bracket body; wherein the locking arm includes a release tab that is configured to be manually engaged to disengage the locking tab from the slots of the attachment arm; and wherein the release tab extends at least partly to a second side of the bracket body, opposite the first side of the bracket body, to be manually engaged from the second side of the bracket body to disengage the locking tab from the slots of the attachment arm.
 5. The bracket system of claim 1, wherein the attachment arm is a first attachment arm and the support bar further includes a second attachment arm that includes a plurality of slots; wherein the channel structure is a first channel structure and the mounting bracket further includes a second channel structure configured to slidably receive the second attachment arm; and wherein the locking tab is a first locking tab and the locking arm includes a second locking tab that is in alignment with the second channel structure and is configured to engage any one of the slots of the second attachment arm, depending on the extent to which the second attachment arm is received within the second channel structure, to further selectively secure the support bar at any of the plurality of heights relative to the mounting bracket.
 6. The bracket system of claim 5, wherein the locking arm extends between the first and second attachment arms, with the first and second locking tabs disposed on laterally opposed sides of the locking arm.
 7. The bracket system of claim 1, wherein the channel structure includes a plurality of tabs that extend from the bracket body to define a partly open channel profile.
 8. The bracket system of claim 1, wherein the mounting bracket further includes a first support arm and a second support arm; and wherein the first and second support arms are configured to engage a first side of the ceiling member, with the bracket body on a second side of the ceiling member that is opposite the first side, to secure the mounting bracket to the ceiling member.
 9. The bracket system of claim 8, with the ceiling member configured as a T-grid bar that includes a vertical stem with a widened top, wherein each of the first and second support arms includes a respective one or more of: an engagement tab that extends toward the second side of the ceiling member when the mounting bracket is secured to the ceiling member, to engage the T-grid bar at the widened top; or a release tab that is configured to be manually engaged to release the first or second support arm from engagement with the T-grid bar.
 10. A mounting bracket for use with a bracket system for securing an electrical device to a building structure via a support body, the building structure including a building member, and the support body including an attachment arm, the mounting bracket comprising: a bracket body; a channel structure on the bracket body, configured to slidably receive the attachment arm; and a locking arm extending from the bracket body, the locking arm including a locking tab that is in alignment with the channel structure; the locking arm being movable relative to the bracket body to move the locking tab relative to the channel structure between an engaged position and a disengaged position, so that the locking arm is configured to selectively secure the support body to the mounting bracket at any of a plurality of insertion distances relative to the channel structure.
 11. The mounting bracket of claim 10, wherein the locking arm is a cantilevered spring arm that is attached at a first end to the bracket body.
 12. The mounting bracket of claim 11, wherein the locking tab is configured to engage any one of a plurality of openings of the attachment arm; and wherein a free end of the cantilevered spring arm forms a release tab that is configured to be manually pressed toward the bracket body to disengage the locking tab from the openings of the attachment arm.
 13. The mounting bracket of claim 12, wherein the channel structure is formed on a first side of the bracket body; wherein the locking tab is configured to engage the openings of the attachment arm on the first side of the bracket body; and wherein the release tab extends at least partly to a second side of the bracket body, opposite the first side of the bracket body, to be manually engaged from the second side of the bracket body to disengage the locking tab from the openings of the attachment arm.
 14. The mounting bracket of claim 10, with the attachment arm being a first attachment arm with a plurality of openings and the support body further including a second attachment arm that is symmetrically arranged relative to the first attachment arm and includes a plurality of openings, wherein the channel structure is a first channel structure and the mounting bracket further includes a second channel structure that is configured to slidably receive the second attachment arm; wherein the locking tab is a first locking tab and the locking arm includes a second locking tab that is in alignment with the second channel structure; and wherein the locking arm is movable relative to the bracket body to simultaneously move the first and second locking tabs into or out of engagement with any one of the openings of the first and second attachment arms, respectively, to selectively secure the support body to the mounting bracket at any of the plurality of insertion distances relative to the channel structure.
 15. The mounting bracket of claim 14, wherein the locking arm extends between the first and second attachment arms, with the first and second locking tabs disposed on opposing sides of the locking arm.
 16. The mounting bracket of claim 14, wherein each of the first and second channel structures includes a plurality of tabs that extend from the bracket body; wherein the tabs of the first channel structure define a first channel profile that is open towards the second channel structure; and wherein the tabs of the second channel structure define a second channel profile that is open towards the first channel structure.
 17. The mounting bracket of claim 16, wherein the locking arm extends between the first and second channel structures to further define the first and second channel profiles.
 18. The mounting bracket of claim 10, with the building member configured as a T-grid bar for a ceiling that includes a vertical stem with a widened top, wherein the mounting bracket further includes a first support arm and a second support arm, and wherein the first and second support arms are configured to engage a first side of the vertical stem, with the bracket body and the channel structure on a second side of the vertical stem that is opposite the first side, to secure the mounting bracket to the ceiling member.
 19. An integrally formed mounting bracket for use with a bracket system for securing an electrical device to a ceiling structure, the ceiling structure including a ceiling member, and the bracket system including a support body that includes a support section to support the electrical device and an attachment arm, the integrally formed mounting bracket comprising: a bracket body; a guide tab extending from the bracket body and bending so that a portion of the guide tab extends laterally across the bracket body, the guide tab being integrally formed with the bracket body and at least partly defining a channel profile that defines an insertion axis and is sized to receive the attachment arm along the insertion axis; a support arm extending away from the bracket body, the support arm defining a clip sized to engage the ceiling member; and a locking arm extending integrally from the bracket body, the locking arm including a locking tab; the locking arm being movable relative to the bracket body to move the locking tab relative to the guide tab between an engaged position, in which the locking tab is in a first alignment with the channel profile along the insertion axis to engage the attachment arm, and a disengaged position, in which the locking tab is in a second alignment with the channel profile along the insertion axis to release the attachment arm.
 20. The integrally formed mounting bracket of claim 19, wherein the attachment arm of the support body is a first attachment arm, and the support body further includes a second attachment arm, the first and second attachment arms extending parallel to each other and each including a plurality of slots, wherein the guide tab is a first guide tab, and the integrally formed mounting bracket further includes a second guide tab, the first and second guide tabs extending from the bracket body and bending toward each other, the first and second guide tabs being configured to engage the first and second attachment arms, respectively; wherein the locking tab is a first locking tab and the locking arm includes a second locking tab, the first and second locking tabs being configured to engage any one of the slots of the first and second attachment arms, when the locking arm is in the engaged position, to selectively secure the support body at any of a plurality of heights relative to the integrally formed mounting bracket. 